I also own a 2014 LEAF SL with 44,000 miles on it. Nice car.
LeftieBiker wrote:Several quick suggestions on pitfalls to avoid:
* Don't leave the car plugged in but not charging for more than a few hours. This will kill the 12 volt battery.
Never had a problem with this. I usually plug the car sometime during the day, it recharges overnight, and I unplug the next day. The earlier cars (2011-2012) (I also owned at 2012) did have this problem if left plugged in for days. This was a bug: the DC to DC converter that charges the 12 V battery would never come on while the car was plugged in and not charging. My car doesn't have this bug, and is an early 2014.
LeftieBiker wrote:* Don't leave the car sitting fully charged for more than a couple of hours, especially in Hot weather. This likely increases battery degradation.
Best practice is to time the charge to complete as soon as reasonable before departure. The difference in battery life is noticeable. Or use timers to keep the charge level below 90% or so most of the time.
LeftieBiker wrote:* Don't recharge when the state of charge (SOC) is higher than 80% unless you really have to do it. Also not good for the battery pack.
Also best practice, but isn't as important. If you find yourself often doing this, there are several ways to avoid it. Ask, or search.
LeftieBiker wrote:* If the car has a Quick Charge (QC) port, avoid using it to fast charge when the battery temp "gauge" shows more than 6 bars. 5 bars or less is best, but not always possible in Summer.
The reason to use the QC is that you need to travel a longer distance than a full battery can give you. So if you are doing a very long drive, you may well get to higher battery temperatures. Battery life gets shorter when battery temperature rises. About twice as fast of loss at 10 C warmer. About 4 times as fast at 20 C warmer. So if you drive a long ways, QC twice and raise your battery temperature from the more normal summer of about 20 C (70F) to 35C or so. Which will shorten the life of the battery by about 3 days. Or if you do this once a year, will shorten battery life by about 1%. So don't worry if you do this once. If you did this every day, would be a problem!
The temperature bars are not at all precise, and 7 Temperature bars could mean a battery temperature as low as 23 C (or 73 F). If you really want to or need to know, I'd suggest you get LeafSpy or similar.